Oil burner



Sept. 15, 1931. P. G. VETTER 1,823,012

OIL BURNER Filed May 8, 1929 wmk A TTORNEY Eatented Eept. 15, 1931 Lannie PETER G. VETTER, OE BERKELEY, CALIFORNIA, ASSIGNGR TO AMELIA VETTER, OF BERKELEY, CALIFORNIA OIL BURNER 4 Application filed May 8, 1929. Serial No. 361,411.

The invention forming the subject matter of this application relates to burners, and more particularly to an extremely efficient type of fuel oil burner.

An object of the invention is to provide a fuel oil burner that contemplates the intermixing of water with the fuel oil in a mixing chamber connected to said burner, and in which the mixture is caused to flow to the burner, and wherein a more perfect combustion of the fuel oil is accomplished with a substantial saving of the fuel oil.

A second object of the invention is to provide a fuel oil burner of the character set forth in which means are provided for controlling the flow of fuel oil so as to regulate the mixture of the fuel oil and the water.

Another object of the invention is to provide a fuel oil burner which comprises an elongated tube having a burner element at one end, and wherein a supply of fuel oil is adapted to flow through said tube and in which water is adapted to be introduced into said tube at a point spaced from the burner element to be intermixed with the fuel oil and flow in admixture through the tube to the burner element at which point air is introduced under pressure for atomizing said mixture. i

A further object of the invention is to i provide a burner which ishighly eiiicient and simple in construction. Convenience of arrangement, lightness and comparative 1nexpense of manufacture are further objects which have been borne in mind in the production and development of the invention.

lVit-h the foregoing and other objects in view, which will be made manifest in the following detailed description and specifically pointed out in the appended claims,

reference is had to the accompanying drawv ings for the illustrative embodiment of the invention, wherein: e V

Fig. 1 18 a longltudmal s1de sectional view of the burner;

Fig. 2 is a longitudinal sectional view taken on the line 2-2 of Fig. 1;

Fig. 3 is a transverse sectional view through the burner conduit and taken on the line 33 of Fig. 1.

Referring to the accompanying drawings, wherein similar reference characters designate similar parts throughout the various figures described above adequately illustrate my invention, and the following detailed description is commensurate with the above mentioned drawings in enabling an artisan to construct and assemble the constituent parts of the same.

The device involves in its general organization a T shaped main element or body member designated by the numeral 5, which body member is provided with a central longitudinal passage 6 which is elbowed so as to extend through the branch 7 of the T member 5. Secured to the branch 7 in registry with the passage 6 is a pipe 8 provided with a flanged end 9 which abuts against the end of said branch and is secured thereto by means of a union 11 which threadedly engages with suitable threads formed on the outer periphery of said branch. The end of the longitudinal portion of the passage 6 is interiorly threaded for engaging the corresponding threads formed on the end of a tubular conduit 12 as at 13. Axially disposed within the conduit 12 is a tube 15 of approximately half the diameter of the said conduit, which extends through the said conduit and the passage 6, and is threaded at the end thereof for engagement in a threaded opening 14 formed in the body portion at the elbow of the passage 6. The other end of the tube 15 terminates adjacent the end of the conduit 12 and is exteriorly threaded for engagement with an interiorly threaded cone shaped nozzle 16 having a restricted spray orifice 17. Numeral 18 indicates a tubular burner casing which is interiorlythreaded for threaded engagement with the end of the conduit 12, as at in the most convenient manner.

may be used for connecting to the oil supply pipe, which allows the device to be connected YVhen the supply pipe is connected to the selected end of the opening 23, the other end of said opening is closed in any suitable way, such as by threading a removable plug 25 the open end as is clearly shown in Fig. 2 of the drawings.

Oil introduced into the passage 23, under a low pressure of approximately tour pounds, will flow through the opening 14 into the tube 15 and flows through said conduit and through the nozzle 16 into the burner casing 18. Air under a pressure of approximately seven and oneehalf pounds is introduced through the pipe 8 into the passage 6 and through the conduit 12. The air under pressure issues from the end of the conduit 12 and acts upon the oil discharging from the nozzle 16 and atomizes the same in the burner casing 18, which atomized oil is discharged through the burner slot 22 in a radially diverging sheet whereupon it may be ignited.

Although the burner will operate in the above described manner, it has been found that the same consumes an excessive amount of fuel oil which renders the operation of this type of burner very expensive. Not only does the burner consume an excessive amount of fuel, but it also leaves a very heavy carbon deposit on the interior of the burner casing and on the furnace or similar machine with which it is used; This necessitates constant care, in that the burner must be dissembled and cleaned at regular intervals to insure its efficient functioning. Therefore,

'it is the main object of this invention to construct a burner that will be saving in fuel and at the same time produce a hot, clean flame. In this respect means are provided for introducing water into the burner and intermixing the water with the oil previous to its discharge from the nozzle 16. Said means comprises an elongated tubular jet 26 which is axially disposed in the tube 15, and is of substantially smaller diameter than that ofthe said tube. The tubular jet 26 extends from a point intermediate the ends of the tube and extends through said tube and the passage 23 and is threadedly engaged in an opening 27 which extends centrally through a nipple 28. Said nipple 28 is which threadedly secured in a threaded opening 31 formed in the end 30 of the T member 5. The nipple 28 is tightly secured in the opening 31 and sealed against leakage by means of a union 32 which threadedly engages with the end of the T member 5. A valve 33 is threadedly secured on the outer end of the nipple 28, and comprises a casing 34 having a screw threaded valve stem 35 mounted therein, and turnable by means of a handle 36, in axial alignment with the opening 27, said valve stem being provided with a needle valve .37 which seats in the mouth of said opening. An inlet port 38 formed in the side of the casing 34 communicates with the interior ofsaid casing and is provided with suitable threads for engaging the threaded end of a water pipe (not shown) which connects the valve 33 with a head of water, such as a water main, having a usual water pressure .of approximately sixty-five pounds.

The free end of the tubular jet 26 is terminated in a taper having a central restricted opening 41 formed therein. A plurality of openings 42 are formed in the side wall of the tube 26 at the tapered end thereof, and are arranged in four diametrically opposed sets, there being three longitudinally spaced openings to each set.

In operation the valve 33 is opened by turning the handle 36 which unseats the needle valve 37 and allows the water, with a pressure of approximately sixty-five pounds to enter the passage 26 and pass through said passage and through the tubular jet 26 to be discharged through the openings 41 and 42 disposed in the end of the jet. When the fuel. oil reaches the end of the jet 26, it intermixes with the water discharging through the openings in the end thereof, and the water and the fuel oil flow in admixture through the remaining portion of the tube 15 and are discharged from the nozzle 16 into the burner casing 18. Upon discharging from the nozzle 16, the admixture of fuel oil and water are acted upon by air which is introduced through the pipe 8 into the passage 6 and through the conduit 12 from which it is discharged into the burner casing 18 and acts upon the mixture of fuel oil and water discharging from the nozzle 16 and atomizes the same in said burner casing, atomized mixture is discharged through the burner slot 22, whereupon it may be ignited.

Means are provided for regulating the proportion of mixture of the fuel oil and the water, and also for accomplishing a more thorough mixture of the same. Said means comprises a short open-ended tube 43 slidably disposed within the tube 15 and frictionally engaging the wall thereof. The end of said tube adjacent the nozzle 16 is tapered and is'provided with a plurality of diametrical kerfs 44 forming vanes 45 therebetween.

tilt) The vanes are slightly and similarly twisted out of their several planes so as to impart a spiral swirl to a fluid passing therethrough. As has been previously stated, the tube 15 functions to regulate the proportion of mixture of fuel oil and water, and in this respect, when it is desired to increase the volume of water and decrease the volume of oil to be mixed, it is merely necessary to slide the tube 43 in the tube 15 so that the open upper end of the same is brought into closer proximity to the end of the jet 26. In a like manner when the tube 43 is moved away from the end of the jet 41 the flow of oil is increased and the proportion of oil in the mixture will be likewise greater. It is to be noted that after the tube 43 is set in position, the same will not slide from the set position due to the frictional engagement of said tube with the wall of the tube 15. When it is desired to slide the tube 43 for adjustment, a suitable tool may be provided for this purpose.

From the foregoing, it is thought that the construction, use, and many advantages of the herein described burner will be adequately understood. It will be further understood that certain material alterations in the construction may be effected without having a deleterious effect upon the efficiency of my device. The minor details will at all times of course be performed within the scope and spirit of the subjoined claims.

lVhat I claim is 1. An oil burner comprising an air receiving cylindrical body member provided with a tip having an elongated slot at one end, an oil tube within said body member connected in the opposite end and communicating with an oil delivery aperture and having at its opposite end a tip with a restricted aperture, :1 water delivery tube within said oil tube terminating intermediate the ends thereof and extending through said oil delivery aperture into communication with a valve controlling a water supply the opposite end having a restricted aperture and transverse apertures adjacent the end thereof, and a tube frictionally slidable within said oil tube and having a kerfed restricted tip.

2. An oil burner comprising a T shaped housing provided with an air connection at the side, a tubular extension at one end terminating in a tip provided with an elongated V slot, an interposed oil tube within said tubular extension communicating with a transverse oil receiving aperture in said housing, the opposite end terminating in a. restricted tip, a water tube within said oil tube and terminating intermediate the ends of the oil tube and provided with a restricted tip and adjacent transverse apertures the opposite end passing through said oil receiving aperture and communicating with a valve chamber, a valve controlling the communicating passage, and a water connnection to said valve chamber, and a. tube slidable within said oil tube and adapted to rest-riot the passageway between theoil tube and the water tube tip, the opposite end being formed into a restricted lierfed tip.

3.-An oil burner comprising an air tube having a removable tip with elongated V slot the opposite end being connected to a housing with transverse air connection, an oil tube within said air tube terminating in a tip with arestricted aperture adjacent the end of said air-tube, the opposite end being fixed in said housing and communicating with a transverse aperture adapted for connection to an oil supply, a water tube within said oil tube having a tip with a restricted aperture and transverse apertures adjacent the tip and terminating intermediate the ends of said oil tube, the opposite end passing through said transverse aperture and communicating with a valve housing adapted for connection to a water supply, and a valve for controlling the flow of water therethrough, and a tube slidable within and frictionally retained within said oil tube and having a kerfed restricted tip at one end, the opposite end being adapted for adjustably restricting the passage between the walls of said oil tube and the tip of said water tube for controlling the flow of oil therethrough.

4:. An oil burner comprising an air tube having a removable tip with elongated V aperture in the end thereof, the opposite end being threadedly connected to a housing and in communication with an air passageway adapted for connection to a supply of compressed air, an oil tube within said air tube terminating in a restricted tip adjacent the end of said air tube tip and passing through said air tube and said air passageway and fixed in said housing and communicating with a transverse aperture in said housing adapted for connection with an oil supply under pressure, a water tube within said oil tube terminating intermediate the ends thereof in a restricted tip with adjacent transverse apertures, the opposite end passing through said oil supply transverse aperture and being fixed in a removable head at the end of said housing, a valve body fixed to said head, an aperture through said head communicating with said water tube, a. needle valve for controlling delivery of water to said water tube, a water supply connection on said valve body, and an oil flow regulating tube slidably mounted and frictionally retained within said oil tube andhaving a restricted kerfed tip, the opposite end being adapted to adjustably restrict the oil passageway between the oil tube and tip of the water tube.

5. An oil burner comprising three tubular coaxially fixed fluid passageways, individu ally connected to three fluid supply chambers, a valve externally operated and forming a part of said burner for controling the innermost tube, a restricting tube Within the intermediate tube and slidably mounted and frictionally retained therein, the inlet end of said tube being adapted to adjustably restrict the passageway between the innermost and the intermediate passageway, the discharge end of each of said passageways and said tube being formed to provide a mixmg zone.

In testimony whereof I have afiixed my signature.

PETER G. VETTER. 

